The 15th episode of ABC’s science fiction anthology series, Tales Of Tomorrow, airs on ABC, with each episode’s opening titles proclaiming that the series is produced “in cooperation with the Science-Fiction League of America”, a collective of sci-fi writers including Isaac Asimov and Theodore Sturgeon among its members. This episode stars Bruce Cabot and Nancy Coleman.
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The 17th episode of Sam Rolfe’s western series Have Gun – Will Travel is broadcast on CBS in the United States, starring Richard Boone. The episode is the fourth of a four-week consecutive streak of scripts written by future Star Trek creator Gene Roddenberry, a frequent writer in the series’ early seasons. 
British broadcaster ABC airs the 67th episode of the spy-fi series The Avengers, starring Patrick Macnee and Honor Blackman. 
The seventh episode of Doctor Who airs on the BBC. The Escape is part three of the story now collectively known as 
NBC airs 
The 17th episode of Irwin Allen’s adventure series Voyage To The Bottom Of The Sea airs on ABC, starring Richard Basehart and David Hedison. John Van Dreelen guest stars.
The 45th episode of Irwin Allen’s science fiction series Lost In Space premieres on CBS, starring Guy Williams, June Lockhart, and Jonathan Harris.
ABC broadcasts the 17th and final episode of the Filmation animated series Fantastic Voyage, based on the 
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NASA formally cancels the planned Apollo 20 mission to the moon’s Copernicus crater in order to begin converting the upper stage of the mission’s Saturn V rocket into the Skylab space station, to be launched in the early 1970s. Construction of the Apollo command/service module and lunar module scheduled to fly this mission was halted before either vehicle was completed. The crew would have consisted of Stu Roosa, Paul Weitz and Jack Lousma; ironically, Weitz was transferred to the first Skylab crew, while Lousma was part of the second Skylab crew. Both later flew on shuttle missions.
ABC airs the 42nd episode of Irwin Allen’s sci-fi series Land Of The Giants, starring Gary Conway, Don Matheson, Deanna Lund, and Don Marshall. Torin Thatcher guest stars.
The third episode of children’s fantasy series The Owl Service is broadcast by British broadcast Granada Television. The series is adapted by novelist Alan Garner from his own novel. 
ITV airs the 15th episode of the mystery/spy-fi series Strange Report in the U.K., starring Anthony Quayle, Kaz Garas, and Anneke Wills (Doctor Who). (The series is an international co-production and airs in the United States on NBC.)
Italian broadcaster RAI premieres the first episode of A come Andromeda, starring Luigi Vannucchi and Nicoletta Rizzi. This is an Italian remake of the BBC’s 1961 sci-fi series A For Andromeda, written by Fred Hoyle and John Elliot; the Italian adaptation is written by Claudio Cassinelli. Unlike the BBC’s original series, all episodes of A come Andromeda exist on videotape.
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The 23rd episode of Harold Jack Bloom’s sci-fi series Project UFO airs on NBC, portraying fictionalized investigations into what the show claims are actual cases from the U.S. Air Force’s Project Blue Book investigations. Edward Winter and Caskey Swaim star. With ratings having fallen throughout the second season, the series is cancelled, with three remaining episodes to be “burned off” during the summer months.
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NBC airs the 41st episode of Donald Bellisario’s science fiction series Quantum Leap, starring Scott Bakula and Dean Stockwell. Sandy Faison and Sherman Howard guest star.
The week-long national syndication window opens for 
The sixth episode of Roger Price’s rebooted science fiction series The Tomorrow People is broadcast on ITV in the U.K. (and will appear later on Nickelodeon in North America), starring Kristian Schmid and Christian Tessier. Naomie Harris (Spyfall), Jean Marsh (Doctor Who), and Connie Booth (Fawlty Towers) guest star in the second season premiere.
Cable channel TNT airs 
The 105th episode of Chris Carter’s modern-day science fiction series The X-Files airs on Fox, starring Gillian Anderson and David Duchovny. Robert Wisden guest stars.
The week-long national syndication window opens for the 
The 32nd episode of Gene Roddenberry’s Earth: Final Conflict, airs in syndication, starring Robert Leeshock, Lisa Howard, Von Flores, and Richard Chevolleau. Majel Barrett Roddenberry (Star Trek) guest stars.
The week-long national syndication window opens for 
The first movie-length installment episode of the miniseries RoboCop: Prime Directives airs on Space in Canada (the series will air in the U.S. on the Sci-Fi Channel in July). Starring Page Fletcher (The Hitchhiker), Maurice Dean Wint (Captain Power, TekWar, Psi Factor), Geraint Wyn-Davies (Forever Knight), and Maria Del Mar (Mercy Point), the series picks up the story of RoboCop over a decade after the original 1987 film. It is unrelated to the 1994 live-action series based on the same character, although this miniseries is produced by the same production company, exercising their TV rights to the character one last time before that option expires.